• 한국토양비료학회지
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• 제41권3호
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• pp.177-183
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• 2008

상토에 함유된 Na이온이 과채류의 육묘에 미치는 영향을 조사하기 위하여 온도조건에 따른 상토의 수분변화, Na이온 및 EC의 경시적 변화, 광합성율, 증산율, 잎의 수분상태, 묘소질, 생육 및 수량성에 대한 실험을 실시하였다. 육묘온도가 $15^{\circ}C$에서는 상토의 수분감소는 적어 3일이 경과하더라도 관수개시점에 도달하지 않았다. 관수 1시간 후 부터 상토로부터 Na 이온이 유리되어 22시간이 지날 때 까지 Na의 농도가 계속 증가하였으며 Na 함량의 증가에 따라 EC의 상승이 있었다. 또한 관수회수가 증가함에 따라 Na의 세탈에 따른 Na 농도가 감소되었고 Na 농도감소에 비해 EC의 감소폭은 적은 편이었다. 양이온 비율중 Na 함량이 60% 이상일 경우 저온에서는 광합성율, 증산율의 감소가 큰 편이었고 포화수분부족도 또한 저온에서 큰 폭으로 높아졌다. Na 함량이 높은 상토에서 육묘된 오이묘는 초장, 세근수 등이 대조상토에 비해 낮은 편이었고 본포 정식후에도 생육이 불량하여 48%정도의 수량감소를 초래하였다.

• 미생물학회지
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• 제13권4호
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• pp.143-156
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• 1975

A rotting bacterium was isolated from decayed root of ginseng (Panax ginseng Meyer), cultured purely, and its pathogenicity was confirmed by reinoculation test. The strain causing ginseng root rot was identified as Pseudomonas fluoresens biotype II. The strain was somewhat different from P.marginalis and P.talaasii, considering the number of flagella, pathotype and ability of indole production. The strain did not exhibit pathogenicity to other plants tested, such as red kidney bean(Phasolus vulgaris L.), soy bean (Glycine max Merr.), cucumber (Cucumis sativus L.) lettuce (Lactuca sativa L.) and cowpea bean (Vigna sinensis Savi.).

• 한방안이비인후피부과학회지
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• 제17권1호
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• pp.34-44
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• 2004

Objectives: The objective of this study was to teach patients clinically useful external application of acne. Methods: We investigated the effects and manufacturing methods of the medical herbs published in the woman's monthly magazines according to "Zhong-Yao-Da-Ci-Dian(中藥大辭典)". Results: We investigated that Saururus chinensis Baill.(三白草), Houttuynia cordata Thunb.(魚腥草), Coix lachrymajobi L.(薏苡仁) were discovered 3 times, Brassica oleracea L.(甘藍), Raphanus sativus L.(래복), Daucus carota L. var. Sativa DC.(홍래복), Oryza sativa L.(米皮糠), Spinacia oleracea L.(파래), Cucumis sativus L.(黃爪) 2 times, and Glycyrrhiza uralensis Fisch.(甘草), Gallus gallus domesticus Braisson.(？子白), Aloe vera L.(노회), Phascolus radiatus L.(綠豆), Prunus persica Batsch.(桃葉), Lycopersicon esculentum Mill.(番茄), Taraxacum mongolicum Hand.-Mazz.(蒲公英), Prunus armeniaca L.(杏仁), Musa paradisiaca L. var. Sapientum O. ktze.(香蕉) and Malus pumila Mill.(평과) were discovered once in woman's monthly magazine during last two years. According to the effects, we classificated four groups which were defervescence(淸熱), subsidence of edema(消腫), pyorrhea(排膿) and gloss(滋潤) group. Conclusion & discussion : We suggested the use of each medical herbs on the Consensus conference on acne classification. We needed the further study on the manufacturing method, the time of use and the dose

• 한국식물병리학회지
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• 제10권1호
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• pp.61-63
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• 1994

A brown leaf and stem spot disease of bayonet-grass (Scirpus maritimus) was epidemic in reclaimed paddy fields of Chunbuk province, Korea. A fungal pathogen was repeatedly isolated from the necrotic lesions of the bayonet-grass and identified as Nimbya scirpicola. The pathogen induced disease symptoms only in bayonet-grass but not in 8 other plants tested; Brassica pathogen induced disease symptoms only in bayonet-grass but not in 8 other plants tested; Brassica compestris subsp. napus var. pekinensis, Cucumis sativus, Glycine max, Hordeum vulgare, Lycopersicon esculentum, Oryza sativa, Sesamum indicum and Triticum aestivum. The fungus has potential to be developed as a mycoherbicide.

• 식물병연구
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• 제14권2호
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• pp.117-121
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• 2008

고구마 뿌리혹선충(Meloidogyne incognita)의 시설재배 오이에 대한 경제적 피해한계를 조사하기 위하여 비닐하우스 내에 합판으로 만든 박스($30{\times}40{\times}15cm$)를 묻고 박스 내 토양 $100cm^3$당 뿌리혹선충 유충의 밀도를 0, 10, 30, 100, 300, 600마리로 조정된 토양을 넣었다. 각 박스에는 '장수신토좌'에 접붙인 '슈퍼만촌'오이 23일 묘를 8월 1일 1포기씩 심고 11월까지 각 구당 오이 수확량을 조사하였다. 뿌리혹선충의 유충밀도와 수량과의 회귀식은 $Y=0.82-0.04{\cdot}Log_{10}$(Pi+1)로 방제 비용을 감안한 경제적 피해 허용 수준은 정식전 뿌리혹선충 유충의 밀도가 토양 $1,000cm^3$당 5마리이면 살선충제 입제 살포가 경제적이고, 유충의 밀도가 토양 $1,000cm^3$당 25마리 이상이면 훈증제를 처리하는 것도 고려해 볼 수 있다. 오이 시설재배시 뿌리혹선충의 피해를 방지하기 위해서는 최소한 정식 수개월 전에 미리 토양 선충 밀도를 조사해야 할 것이다.

• 한국토양비료학회지
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• 제30권2호
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• pp.196-199
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• 1997

식물생장촉진 효과가 있는 Micrococcus sp., Bacillus subtilis, Enterobacter agglomerans, Bacillus megaterium, Pseudomonas putide, Pseudomans fluorescens, Cellulomonas sp., Staphylococcus xylosus등 8종의 혼합균주 배양액을 오이에 처리하였을때 작물에 미치는 영향을 조사한 결과는 다음과 같다. 1. 균처리구는 대조구에 비해 수량은 18% 증수되었으며, 주당 수확과수는 평균 5.1개 정도 많았다. 2. 만장, 엽장, 엽폭은 균처리구와 대조구간에 차이가 없었지만 줄기의 굵기, 2차측지 발생율, 유인 측지절수, 절성성은 균처리구가 대조구에 비해 양호하였다. 3. 토양의 물리성중 가밀도, 공극률은 차이가 없었으나 수분율은 균처리구가 대조구에 비해 높은 경향이었으며, 토양 화학성은 균처리구가 대조구에 비해 EC, 유기물, Ca, $NO_3-N$ 함량은 낮아졌으며, 그외 성분은 높은 경향이었다.

• 한국식품영양과학회지
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• 제27권6호
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• pp.1105-1109
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• 1998

The superoxide dismutase(SOD) in peeled pericarp of cucumber was most stable at pH 8.0 and relatively stabe between pH 5.0 and 9.0. The enzyme was stable up to 6$0^{\circ}C$ and retained 12% by heat treatment at 10$0^{\circ}C$ for 5 min. At pH 2.0, the peeled pericarp enzyme activity was decreased to 10% by incubation for 3 hrs. However, the enzyme activity was increased above 25% after incubating the enzyme at pH 7.0 for 6 hrs. Retention of SOD activity in cucumber by various heating methods was also measured. The residual SOD activities of peeled pericarp and whole cucumber was estimated to be 25% and 27% after blanching(2 min), respectively. The skin enzyme retained 53% of its activity after steaming (3 min). When the peeled pericarp enzyme was incubated at 4$^{\circ}C$ for 20 days, the enzyme activity remained about 81%. However, when the enzyme incubated at 3$0^{\circ}C$ for 20 days, the peeled pericarp enzyme activity decreased to 17% of its original activity. The enzyme activity of peeled pericarp cucumber was not changed after exhaustive dialysis for 3 days, which indicated that the SOD activity in cucumber seems to have molecular weight above 12,000.

• 한국유기농업학회지
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• 제19권spc호
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• pp.222-224
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• 2011

The effects of seawater on growth of lettuce(Lactuca sativa L.), leaf perilla(Perilla frutescens var. japonica Hara), red pepper(Capsicum annuum L.) and cucumber(Cucumis sativus L.) seedlings were investigated in the glass greenhouse. These effects were studied on seedlings, and diluted seawater (1%, 5%, 10%, 20%, 50%, 100% v/v) was sprayed enough on leaves. The tested four vegetable crops have well grown up to 10% diluted seawater, but the tested vegetable crops were damaged from increasing salt levels. Of these, lettuce was provided salt-tolerant vegetable crop and red pepper was considered salt-sensitive vegetable crop. The salt tolerance of vegetable crops is different between crops and complicated because of additional detrimental effects caused by accumulated ions or specific ion toxicities in their leaves. These results show that agricultural use of seawater may be benefit crop cultivation in organic farming system as well as in conventional farming system.

• Plant Resources
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• 제7권1호
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• pp.47-53
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• 2004

Several wild plant species are known to contain biologically active substances that are allelopathic to weed species as well as antioxidant to foods. Plant extracts or residues from leaves of 4 species, Achyranthes japonica (speedwell), Cucumis sativus (Cucumber), Trifolium repens (white clover), and Vicia angustifolia (narrowleaf vetch) were bioassayed against Medicago sativa (alfalfa) or Echinochloa crus-galli (barnyard grass) to determine their allelopathic effects, and used for measurement of antioxidant activities. The aqueous extracts applied on filter paper significantly inhibited root growth of alfalfa. Aqueous extracts or residues from V. angustifolia showed the most inhibitory effect on alfalfa or barnyard grass seedling growth and followed by A. japonica and T. repens. Oxidative stability by Rancimat method, antioxidant activity by TBA (2-thiobarbituric acid) method and DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activity for the ground samples or methanol extracts were the greatest in V. angustifolia, although were less than those of commonly used antioxidants, BHT (butylated hydroxytoluene) and ascorbic acid. These results suggest that the wild plant species had potent allelopathic and antioxidant activities, and that their activities differed depending on plant species.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제5권3호
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• pp.86-93
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• 2024

Unintentional dispersal of organisms has explosively increased due to expansion of human activities. Among introduced organisms, some organisms are categorized as invasive species because of their effects on environmental risk, economic loss, and human health. In 2023, a leopard slug (Limax maximus) was reported in Suwon, Republic of Korea. This slug was designated as a potential invasive species because a wide range of plant species were identified as food sources for this slug in its original habitats. However, it is difficult to investigate the ecological risk of this newly introduced slug in Republic of Korea. Therefore, the potential ecological risk from this newly introduced slug was estimated by meta-genome analyses of its feces. Through meta-genome analyses, 22 Families, 28 Genera, and 26 Species of land plants were identified. Among these 26 identified plant species, six economically important crops - squash (Cucurbita maxima), tomato (Solanum lycopersicum), potato (Solanum tuberosum), cowpea (Vigna unguiculata), rice (Oryza sativa), and oriental melon (Cucumis melo) - were identified. Therefore, leopard slugs potentially could cause economic losses in Republic of Korea. Further study is required to build a control strategy against leopard slugs.